Fima
費馬(已裂變原子數與初始的總裝料金屬原子數之比)
??? 情景例句
We just don't see each other anymore.
我們彼此差不多見不到面了。
Who is the auther of this play?
誰是這戲劇的作者？
Excuse me, are you American?
你是美國人嗎？